同塔双回超高压输电线路T接过渡方案设计研究

Design of T-connection Transition Scheme for Double Circuit EHV Transmission Lines on the Same Tower

超高压输电线路已逐渐发展成为国家电网主干网络骨架,为配合高速铁路、高速公路及城市其他重要设施建设,避免造成双回同停的一级电网风险,需通过T接过渡方案来实现同塔双回超高压输电线路的迁改。由于目前常见的在原杆塔新增T接横担来实现T接的方案存在许多缺陷,因此通过设计研究提出了一种新型T接过渡方案,该方案降低了施工难度,缩短了施工周期,降低了停电风险,为国内超高压首次档中T接过渡方案,值得相关人员借鉴。

The EHV transmission line has gradually developed into the backbone network framework of the State Grid.In order to cooperate with the construction of high-speed railway,expressway and other important urban facilities,and to avoid the risk of double circuit stopping at the same time,T-connection transition scheme is needed to realize the relocation of double circuit EHV transmission line on the same tower.There are many defects in the common scheme of adding T-joint cross arm to the original tower to realize T-joint.In this paper,through the design and research,a new T-connection transition scheme is proposed,which reduces the construction difficulty,shortens the construction period,and reduces the risk of power failure.It is the first T-connection transition scheme for EHV in China.